LS1/2/6 HI-RAM, IM CARB, BASE ONLY

The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold (Part Number 300-226BK) is a cast aluminum, black finish lower intake manifold designed for high-performance naturally aspirated or forced induction applications. It is compatible with GM LS1, LS2, and LS6 engines with cathedral port cylinder heads. This manifold is carbureted base only and includes fuel rails. It is designed to accept a wide range of carbureted and EFI tops. The runner length is 6.58 inches, with an as-cast runner cross-sectional area tapered from 4.25 in² to 2.53 in². It features a port size of 2.49 inches high by 1.21 inches wide. The plenum top gasket type is a 3/32 inch round O-ring cord, and the mounting flange gasket type is a standard LS3 molded O-ring. Intended for use on engines in the 6.0 to 7.0+ liter range, with a max power at 7000-8000+RPM. The basic operating RPM range is 3500-8000. It has a deck height of 9.24, is made of cast aluminum, and has a removable top/lid. It is a single plane manifold with vacuum ports. Comes with a manufacturer's limited 90-day warranty.